Is there a free voip api for android [closed]

Question

I am developing an application where I need to implement VOIP.
It is about connecting 2 devices using WIFI to transmit conversation (voice).

My question is: Is there a free API or SDK that I can use in my application?

Answer 1

See here :http://developer.android.com/reference/android/net/sip/package-summary.html

Here is a demo app:http://developer.android.com/resources/samples/SipDemo/index.html

you can also use third party api (here)